Lightroom cannot open catalog becouse another application already has it open.

I aget a message that another application has the catolog open but I ahve no idea what has it open. Any idaes on how to figure out what program has it open?

This message is probably due to the fact that the so-called "lock-file" has not been deleted when you last exited Lr.
In your OS (Mac Finder / Win Explorer) open the folder that contains the Lr catalog. If you don't know where it is, see here for your OS: http://helpx.adobe.com/lightroom/kb/preference-file-locations-lightroom-4.html
The Lr catalog is the file ending with < .lrcat>. Don't touch that one. But see if there is just besides it another file with the ending <lrcat.lock>. This is the so-called lock-file that prevents that Lr can be opened in more than one instances. It should be present when Lr is open but should not be there when Lr is closed.
If you see this lock-file while Lr is closed, send it to the Trash-Bin / Recycle Bin, i.e. delete it. You should then be able to open Lr.

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I am unable to access my LR5.7 Catalog of my recent holiday. I am running Windows 7 (64Bit) and recently installed and then uninstalled DxO Optics Pro. The error message says it "cannot be opened because another application already has it opened.Quit the

I am unable to access my LR5.7 Catalog of my recent holiday. I am running Windows 7 (64Bit) and recently installed and then uninstalled DxO Optics Pro. The error message says it "cannot be opened because another application already has it opened.Quit the other copy of Lightroom before trying to launch" The problem is, that I can only see one copy of LR5 open and cannot locate the ".lrcat.lock" file for the specific catalog I want to open. I have tried re-booting my computer, but this did not work.

Thanks Geoff. I was finally able to locate the ".lrcat.lock" file relevant to the catalog I want to open. Once I deleted it, LR5 was able to access my images. Problem solved. THANK YOU

Lightroom 3 cannot open because another application already has it opened.

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Look in the folder where your catalog is and remove the file with a .lock extension. That should do the trick. The file is to prevent two openings of the same catalog and is usually left when Lightroom is closed incorrectly.

I can't open a catalogue because it says that another application already has it opened.

I am using Lightroom 4. I have been working on one catalogue & then switched to another. Everytime I try to open the first catalogue it say it is already open by another application. It is not open anywhere else. I have obviously rebooted my PC but the same error comes up. I can go to the backup of the catalogue, but I have done a lot of work on the images since then. Can someone please help?

With Lightroom closed down, use Explorer to browse to the folder that contains the catalog that you are trying to open. In that folder, alongside the catalog, should be a file that has the same name as the catalog with the addition of a ".lock" extension. This is the lock file that is created every time you open a catalog and is supposed to be deleted when you close that catalog. If it already exists when you try to open the catalog, you get the problem that you are experiencing. So, if that "lock" file is there, simply delete it (making absolutely certain you delete the file ending in ".lock" only). Then you should be able to start Lightroom and open that catalog.

Having problemErro Message: T he Light Room Catalog name "Lightroom5 Catalog" cannot be open because anotherapplication already has it open. Quit the other copyof lightroom brfore trying to launch. with CC and lightroom ,

Erro Message:
T he Light Room Catalog name “Lightroom5 Catalog” cannot be open because anotherapplication already has it open.
Quit the other copyof lightroom brfore trying to launch.

Thank you so much! This worked. You are right. My Computer Security program was freaking out and crashing that day and I was working on my pictures while I was doing online chats to fix my Security program problems. Since I posted this question I removed and reinstalled Lightroom and was shocked when that didn't fix the problem....all because that catalog with the LOCK extension was there.
I really appreciate your help - ALOT.

When I open iphoto the following message appears 'Your photo library is either in use by another application or has become unreadable'

when I open iphoto the following message appears 'Your photo library is either in use by another application or has become unreadable'

Reboot you system, if you have not already done so - this should take care of the "in use by another application" part of the message.
If the problem persist you will need to create a new library or to repair your library, or to restore it from your backup.
If you do not yet have any images in your iPhoto Library simply move it to the Trash and hold down the option-key while launching iPhoto again. This will give you the option to create a new iPhoto Library or to pick another one, if you have other libraries.
To fix your current library, or to restore it from backup, if you already have pictures inside that you need to save, see Terence Devlin's posts here:
Re: Why do I keep getting asked to repair my iPhoto library?
Re: when I open iphoto I get an error message that says Your photo library is either in use by another application or has become unreadable,
Regards
Léonie

When I open iphoto I get an error message that says Your photo library is either in use by another application or has become unreadable,

when I open iphoto I get an error message that says Your photo library is either in use by another application or has become unreadable, I have tried restarting computer and opening iphoto whilst holding down option and command key, but then I get the following message-Your photo library is damaged or unreadable and cannot be opened. Please restore from a backup. Please can anyone help?

Make a back up now. If you have any vaule in Your photos always have a back up.
Most Simple Back Up
Drag the iPhoto Library from your Pictures Folder to another Disk. This will make a copy on that disk.
Slightly more complex:
Use an app that will do incremental back ups. This is a very good way to work. The first time you run the back up the app will make a complete copy of the Library. Thereafter it will update the back up with the changes you have made. That makes subsequent back ups much faster. Many of these apps also have scheduling capabilities: So set it up and it will do the back up automatically. Examples of such apps: Chronosync or DejaVu . But are many others. Search on MacUpdate
In Library Manager the Rebuild command is under the File menu. There's also an excellent Help available.
Regards
TD

I was trying to move iphoto library to my external hardrive, realised it was incompatible with Mac. The iphoto will not open now, message is "Iphoto library is either in use by another application or has become unreadable". I have read other posts.

Hi,
I was trying to save a copy of my iphoto library by copying images to my external harddrive. I wasn't sure how to do it, realised the hard drive is not compatible. Now the iphoto library wont open and reads "iphoto library is either in use by another application or has become unreadable".
I have tried to use options command and click on iphoto then rebuild yet nothing happens and same error message occurs.
I have gone to my personal drive, desktop, iphoto library, and found file Albumdata.xml and when i click on it, there is a lot of text in it, i am assuming these are all my photos.
I have tried clicking and dragging this file to iphoto app and it doesn't work, as the same error comes up in iphoto being in use or unreadable....
What am I meant to do with albumdata.xml file and how do I reopen Iphoto from here on in?
Please help as I am not technically minded and still trying to understand how to use the Macbook at all as I am used to Microsoft.
Thank you very much,
KS

Rule Number One - NEVER go directly uinto the iPhoto library - there are no user servicable parts in it and making any change no matter how small can corrupt your library and cause data or photo loss
Exactly how were you trying to save a copy of your iPhoto library?
Albumdata.xml does not contain your photos - and again NEVER make any changes to the content of the iPhoto library - no dragging - no changes - never go into the library
We need to know exactly what you did
And probalby the easiest solution is to load your backup from before you messed things up
For reference after you get things working
Moving the iPhoto library is safe and simple - quit iPhoto and drag the iPhoto library intact as a single entity to the external drive - depress the option key and launch iPhoto using the "select library" option to point to the new location on the external drive - fully test it and then trash the old library on the internal drive (test one more time prior to emptying the trash)
And be sure that the External drive is formatted Mac OS extended (journaled) (iPhoto does not work with drives with other formats) and that it is always available prior to launching iPhoto
And backup soon and often - having your iPhoto library on an external drive is not a backup and if you are using Time Machine you need to check and be sure that TM is backing up your external drive
LN

How do I re-open and get back into my iPhoto if this message appears: "Your photo library is either in use by another application or has become unreadable"? What do I do?

How do I re-open and get back into my iPhoto if this message appears: "Your photo library is either in use by another application or has become unreadable"? What do I do?

Rebuild your iPhoto Library:
iPhoto 6 and later: Rebuilding the iPhoto library

How do I restore my iPhoto. When I open i get a window dialog "Your iphoto library is either in use by another application or has become unreadable shut down and restart your computer. If problem persists, try rebuilding your iphoto library. To do th

When I try to open iPhoto I get a window dialog that says...
Your photo library is either in use by another application or has become unreadable
Shut down and restart your computer, and then open iPhoto again. If the problem persists, try rebuilding your photo library. To do this, quit iPhoto, and then reopen it while keeping the Option and Command keys pressed. You can also try restoring your photo library from a backup.
I have tried the reopen it while keeping the Option and Command keyes pressed.
No change.
I dee nothing but a blank page,
Any help would be appreciated.
Also hace back ups of all images on cd's. dvds and jump drives.
Any advice is appreciated.

Option 1
Back Up and try rebuild the library: hold down the command and option (or alt) keys while launching iPhoto. Use the resulting dialogue to rebuild. Choose to Repair Database. If that doesn't help, then try again, this time using Rebuild Database.
If that fails:
Option 2
Download iPhoto Library Manager and use its rebuild function. (In early versions of Library Manager it's the File -> Rebuild command. In later versions it's under the Library menu.)
This will create an entirely new library. It will then copy (or try to) your photos and all the associated metadata and versions to this new Library, and arrange it as close as it can to what you had in the damaged Library. It does this based on information it finds in the iPhoto sharing mechanism - but that means that things not shared won't be there, so no slideshows, books or calendars, for instance - but it should get all your events, albums and keywords, faces and places back.
Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one.
Regards
TD

Hi, I have a brand new imac which i got today and when I open Iphoto all i get is the error message "Your photo library is either in use by another application or has become unreadable" any ideas? thanks

Hi, I have a brand new imac which i got today and when I open Iphoto all i get is the error message "Your photo library is either in use by another application or has become unreadable" any ideas? thanks

Are there photos in the Library? If not then just trash it and launch iphoto. It will make a new one.
If there are pics in it then Download iPhoto Library Manager and use its rebuild function. This will create a new library based on data in the albumdata.xml file. Not everything will be brought over - no slideshows, books or calendars, for instance - but it should get all your albums and keywords back.
Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one.

Why does iPhoto give me this error when opening it " Your photo library is either in use by another application or has become unreadable"

Good Day. I have been trying to open my iPhoto and i keeps giving me the following error message " Your photo library is either in use by another application or has become unreadable " Then it suggests I push the Option and Command button at time of opening iPhoto and the 4 options given do not work as well. My operating system is OS X Vers 10.8.5. Not sure the iPhoto application as it won't open for me to tell.
Pls help . Im afraid of losing all my pics.

Make a back up now. If you have any vaule in Your photos always have a back up.
Most Simple Back Up
Drag the iPhoto Library from your Pictures Folder to another Disk. This will make a copy on that disk.
Slightly more complex:
Use an app that will do incremental back ups. This is a very good way to work. The first time you run the back up the app will make a complete copy of the Library. Thereafter it will update the back up with the changes you have made. That makes subsequent back ups much faster. Many of these apps also have scheduling capabilities: So set it up and it will do the back up automatically. Examples of such apps: Chronosync or DejaVu . But are many others. Search on MacUpdate
In Library Manager the Rebuild command is under the File menu. There's also an excellent Help available.
Regards
TD

After a power failure while iPhoto was running, I get the message "Your photo library is either in use by another application or has become unreadable" and iPhoto will not open????

After a power failure while iPhoto was running, I get the message "Your photo library is either in use by another application or has become unreadable" and iPhoto will not open???? held down the option and the command and tried to run what was ticked off and it just sits there with a spinning wheel and does nothing, can I throw the app away and download a new one? or will it still not open?

, can I throw the app away and download a new one? or will it still not open?
You could, but the error message is indicating that your iPhoto library needs repairing.
Check, if iPhoto will run, if you launch it on a new library. Hold down the alt/option key, while you launch iPhoto. Select to create a new library from the panel that will show. Can you create a new library? If yes, try again to fix the library. Which options have you tried from the Library First Aid panel, when you launched iPhoto with the option and command key held down?
If you have not tried "Rebuild"; do that next. But be sure to make a backup of your iPhoto library, before you try this.

Why when I looking at application, already installed apps open

why when I looking at application, already installed apps open; example is open google apps, Epson apps, adobe flash apps ....

Is all the media in your library? If so backup and then immediately restore the device.
tt2

I can't open my iPhoto i keep getting an error your iPhoto is either in use by another application or has become unreadable what do I do?

i cant open my iphoto i keep getting an error saying your photo library is either in use by another application or has become ubreadable

reboot your Mac
If that does not do it then Back up your iPhoto library, Depress and hold the option (alt) and command keys and launch iPhoto - rebuild your iPhoto library database
LN

Lightroom cannot open catalog becouse another application already has it open.

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